## Oneway (time) effect Random Effect Model
## (Swamy-Arora's transformation)
##
## Call:
## plm(formula = value ~ treatment, data = SutNarrow, effect = "time",
## model = "random", index = c("uniqid"))
##
## Balanced Panel: n = 302, T = 9, N = 2718
##
## Effects:
## var std.dev share
## idiosyncratic 1197.631 34.607 0.987
## time 16.062 4.008 0.013
## theta: 0.555
##
## Residuals:
## Min. 1st Qu. Median 3rd Qu. Max.
## -61.9325 -28.6639 -2.5889 33.7276 64.3014
##
## Coefficients:
## Estimate Std. Error t-value Pr(>|t|)
## (Intercept) 39.3854 1.9657 20.0367 < 2.2e-16 ***
## treatmentmessage 21.9850 1.9818 11.0936 < 2.2e-16 ***
## treatmentmixed 10.6093 1.9140 5.5430 3.259e-08 ***
## treatmentpaycomm 10.8862 2.1315 5.1072 3.497e-07 ***
## treatmentteamtreat 16.3130 2.6138 6.2412 5.022e-10 ***
## ---
## Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
##
## Total Sum of Squares: 3403100
## Residual Sum of Squares: 3249200
## R-Squared: 0.045244
## Adj. R-Squared: 0.043836
## F-statistic: 32.1409 on 4 and 2713 DF, p-value: < 2.22e-16